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                    <h1 class="description center-align post-title">vue.js+ant-design结合Django实现大文件分片上传</h1>
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                                <span class="chip bg-color">前端</span>
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                <p>分片上传在大文件进行传输时经常回使用到，我们将一个特别大的文件切割成一个个小的文件分开进行上传，然后会将这些文件先写入临时文件中，上传完毕后将这些临时文件再按照顺序进行读取写入新文件中，随后删除这些临时文件。</p>
<ul>
<li>恶略的网络环境  如果我们在在一个网络环境特别恶略的情况下，在上传大文件时，如果不使用分片上传的话，忽然网络链接中断了，那只能在从头开始上传。</li>
<li>断点续传  中途暂停之后，可以从上次上传完成的位置继续上传</li>
<li>加速上传  可以将一个大文件分割成多个小文件进行异步上传</li>
<li>流式上传  可以在需要上传的文件大小还不确定的情况下开始上传。比如说经常见到的监控摄像头</li>
</ul>
<p>首先前端安装需要的库</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">npm install spark-md5 --save</span><br><span class="line">npm install axios --save</span><br></pre></td></tr></table></figure>

<p>在vue的main.js文件中进行配置</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> ant <span class="keyword">from</span> <span class="string">&#x27;ant-design-vue&#x27;</span></span><br><span class="line"><span class="keyword">import</span> <span class="string">&#x27;ant-design-vue/dist/antd.css&#x27;</span></span><br><span class="line"></span><br><span class="line">Vue.use(ant)</span><br><span class="line"></span><br><span class="line"><span class="comment">/*引入axios*/</span></span><br><span class="line"><span class="keyword">import</span> Axios <span class="keyword">from</span> <span class="string">&#x27;axios&#x27;</span></span><br><span class="line">Vue.prototype.axios = Axios;</span><br></pre></td></tr></table></figure>

<p>前端进行大文件的分片的阈值对文件进行分割，并记录每一片文件的切割顺序，再次使用sparkMD5来计算文件的唯一标识防止多个文件同时上传导致文件混乱，在每一次分片的上传中，会将分片实体，切割顺序（chunk）以及唯一标识（identifier）异步发送到后端接口，后端将chunk和identifier结合在一起作为临时文件写入写入服务器磁盘中，当前端将所有的分片文件都发送完毕后，最后一次后端另写一个接口，后端将所有的文件合并，并将临时文件进行删除。</p>
<p>来吧建立js文件实现一下</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span 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class="line">152</span><br><span class="line">153</span><br><span class="line">154</span><br><span class="line">155</span><br><span class="line">156</span><br><span class="line">157</span><br><span class="line">158</span><br><span class="line">159</span><br><span class="line">160</span><br><span class="line">161</span><br><span class="line">162</span><br><span class="line">163</span><br><span class="line">164</span><br><span class="line">165</span><br><span class="line">166</span><br><span class="line">167</span><br><span class="line">168</span><br><span class="line">169</span><br><span class="line">170</span><br><span class="line">171</span><br><span class="line">172</span><br><span class="line">173</span><br><span class="line">174</span><br><span class="line">175</span><br><span class="line">176</span><br><span class="line">177</span><br><span class="line">178</span><br><span class="line">179</span><br><span class="line">180</span><br><span class="line">181</span><br><span class="line">182</span><br><span class="line">183</span><br><span class="line">184</span><br><span class="line">185</span><br><span class="line">186</span><br><span class="line">187</span><br><span class="line">188</span><br><span class="line">189</span><br><span class="line">190</span><br><span class="line">191</span><br><span class="line">192</span><br><span class="line">193</span><br><span class="line">194</span><br><span class="line">195</span><br><span class="line">196</span><br><span class="line">197</span><br><span class="line">198</span><br><span class="line">199</span><br><span class="line">200</span><br><span class="line">201</span><br><span class="line">202</span><br><span class="line">203</span><br><span class="line">204</span><br><span class="line">205</span><br><span class="line">206</span><br><span class="line">207</span><br><span class="line">208</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> SparkMD5 <span class="keyword">from</span> <span class="string">&#x27;spark-md5&#x27;</span></span><br><span class="line"><span class="keyword">import</span> axios <span class="keyword">from</span> <span class="string">&#x27;axios&#x27;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">//错误信息</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">getError</span>(<span class="params">action, option, xhr</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">let</span> msg</span><br><span class="line">    <span class="keyword">if</span> (xhr.response) &#123;</span><br><span class="line">        msg = <span class="string">`<span class="subst">$&#123;xhr.response.error || xhr.response&#125;</span>`</span></span><br><span class="line">    &#125; <span class="keyword">else</span> <span class="keyword">if</span> (xhr.responseText) &#123;</span><br><span class="line">        msg = <span class="string">`<span class="subst">$&#123;xhr.responseText&#125;</span>`</span></span><br><span class="line">    &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">        msg = <span class="string">`fail to post <span class="subst">$&#123;action&#125;</span> <span class="subst">$&#123;xhr.status&#125;</span>`</span></span><br><span class="line">    &#125;</span><br><span class="line">    <span class="keyword">const</span> err = <span class="keyword">new</span> <span class="built_in">Error</span>(msg)</span><br><span class="line">    err.status = xhr.status</span><br><span class="line">    err.method = <span class="string">&#x27;post&#x27;</span></span><br><span class="line">    err.url = action</span><br><span class="line">    <span class="keyword">return</span> err</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// 上传成功完成合并之后，获取服务器返回的json</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">getBody</span>(<span class="params">xhr</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">const</span> text = xhr.responseText || xhr.response</span><br><span class="line">    <span class="keyword">if</span> (!text) &#123;</span><br><span class="line">        <span class="keyword">return</span> text</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="keyword">try</span> &#123;</span><br><span class="line">        <span class="keyword">return</span> <span class="built_in">JSON</span>.parse(text)</span><br><span class="line">    &#125; <span class="keyword">catch</span> (e) &#123;</span><br><span class="line">        <span class="keyword">return</span> text</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 分片上传的自定义请求，以下请求会覆盖element的默认上传行为</span></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="function"><span class="keyword">function</span> <span class="title">upload</span>(<span class="params">option</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">if</span> (<span class="keyword">typeof</span> XMLHttpRequest === <span class="string">&#x27;undefined&#x27;</span>) &#123;</span><br><span class="line">        <span class="keyword">return</span></span><br><span class="line">    &#125;</span><br><span class="line">    <span class="keyword">const</span> spark = <span class="keyword">new</span> SparkMD5.ArrayBuffer()<span class="comment">// md5的ArrayBuffer加密类</span></span><br><span class="line">    <span class="keyword">const</span> fileReader = <span class="keyword">new</span> FileReader()<span class="comment">// 文件读取类</span></span><br><span class="line">    <span class="keyword">const</span> action = option.action <span class="comment">// 文件上传上传路径</span></span><br><span class="line">    <span class="keyword">const</span> chunkSize = <span class="number">1024</span> * <span class="number">1024</span> * <span class="number">1</span> <span class="comment">// 单个分片大小，这里测试用1m</span></span><br><span class="line">    <span class="keyword">let</span> md5 = <span class="string">&#x27;&#x27;</span><span class="comment">// 文件的唯一标识</span></span><br><span class="line">    <span class="keyword">const</span> optionFile = option.file <span class="comment">// 需要分片的文件</span></span><br><span class="line">    <span class="keyword">let</span> fileChunkedList = [] <span class="comment">// 文件分片完成之后的数组</span></span><br><span class="line">    <span class="keyword">const</span> percentage = [] <span class="comment">// 文件上传进度的数组，单项就是一个分片的进度</span></span><br><span class="line"></span><br><span class="line">    <span class="comment">// 文件开始分片，push到fileChunkedList数组中， 并用第一个分片去计算文件的md5</span></span><br><span class="line">    <span class="keyword">for</span> (<span class="keyword">let</span> i = <span class="number">0</span>; i &lt; optionFile.size; i = i + chunkSize) &#123;</span><br><span class="line">        <span class="keyword">const</span> tmp = optionFile.slice(i, <span class="built_in">Math</span>.min((i + chunkSize), optionFile.size))</span><br><span class="line">        <span class="keyword">if</span> (i === <span class="number">0</span>) &#123;</span><br><span class="line">            fileReader.readAsArrayBuffer(tmp)</span><br><span class="line">        &#125;</span><br><span class="line">        fileChunkedList.push(tmp)</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 在文件读取完毕之后，开始计算文件md5，作为文件唯一标识</span></span><br><span class="line">    fileReader.onload = <span class="keyword">async</span> (e) =&gt; &#123;</span><br><span class="line">        spark.append(e.target.result)</span><br><span class="line">        md5 = spark.end() + <span class="keyword">new</span> <span class="built_in">Date</span>().getTime()</span><br><span class="line">        <span class="built_in">console</span>.log(<span class="string">&#x27;文件唯一标识--------&#x27;</span>, md5)</span><br><span class="line">        <span class="comment">// 将fileChunkedList转成FormData对象，并加入上传时需要的数据</span></span><br><span class="line">        fileChunkedList = fileChunkedList.map(<span class="function">(<span class="params">item, index</span>) =&gt;</span> &#123;</span><br><span class="line">            <span class="keyword">const</span> formData = <span class="keyword">new</span> FormData()</span><br><span class="line">            <span class="keyword">if</span> (option.data) &#123;</span><br><span class="line">                <span class="comment">// 额外加入外面传入的data数据</span></span><br><span class="line">                <span class="built_in">Object</span>.keys(option.data).forEach(<span class="function"><span class="params">key</span> =&gt;</span> &#123;</span><br><span class="line">                    formData.append(key, option.data[key])</span><br><span class="line">                &#125;)</span><br><span class="line">                <span class="comment">// 这些字段看后端需要哪些，就传哪些，也可以自己追加额外参数</span></span><br><span class="line">                formData.append(option.filename, item, option.file.name)<span class="comment">// 文件</span></span><br><span class="line">                formData.append(<span class="string">&#x27;chunkNumber&#x27;</span>, index + <span class="number">1</span>)<span class="comment">// 当前文件块</span></span><br><span class="line">                formData.append(<span class="string">&#x27;chunkSize&#x27;</span>, chunkSize)<span class="comment">// 单个分块大小</span></span><br><span class="line">                formData.append(<span class="string">&#x27;currentChunkSize&#x27;</span>, item.size)<span class="comment">// 当前分块大小</span></span><br><span class="line">                formData.append(<span class="string">&#x27;totalSize&#x27;</span>, optionFile.size)<span class="comment">// 文件总大小</span></span><br><span class="line">                formData.append(<span class="string">&#x27;identifier&#x27;</span>, md5)<span class="comment">// 文件标识</span></span><br><span class="line">                formData.append(<span class="string">&#x27;filename&#x27;</span>, option.file.name)<span class="comment">// 文件名</span></span><br><span class="line">                formData.append(<span class="string">&#x27;totalChunks&#x27;</span>, fileChunkedList.length)<span class="comment">// 总块数</span></span><br><span class="line">            &#125;</span><br><span class="line">            <span class="keyword">return</span> &#123; <span class="attr">formData</span>: formData, <span class="attr">index</span>: index &#125;</span><br><span class="line">        &#125;)</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 更新上传进度条百分比的方法</span></span><br><span class="line">        <span class="keyword">const</span> updataPercentage = <span class="function">(<span class="params">e</span>) =&gt;</span> &#123;</span><br><span class="line">            <span class="keyword">let</span> loaded = <span class="number">0</span><span class="comment">// 当前已经上传文件的总大小</span></span><br><span class="line">            percentage.forEach(<span class="function"><span class="params">item</span> =&gt;</span> &#123;</span><br><span class="line">                loaded += item</span><br><span class="line">            &#125;)</span><br><span class="line">            e.percent = loaded / optionFile.size * <span class="number">100</span></span><br><span class="line">            option.onProgress(e)</span><br><span class="line">        &#125;</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 创建队列上传任务，limit是上传并发数，默认会用两个并发</span></span><br><span class="line">        <span class="function"><span class="keyword">function</span> <span class="title">sendRequest</span>(<span class="params">chunks, limit = <span class="number">2</span></span>) </span>&#123;</span><br><span class="line">            <span class="keyword">return</span> <span class="keyword">new</span> <span class="built_in">Promise</span>(<span class="function">(<span class="params">resolve, reject</span>) =&gt;</span> &#123;</span><br><span class="line">                <span class="keyword">const</span> len = chunks.length</span><br><span class="line">                <span class="keyword">let</span> counter = <span class="number">0</span></span><br><span class="line">                <span class="keyword">let</span> isStop = <span class="literal">false</span></span><br><span class="line">                <span class="keyword">const</span> start = <span class="keyword">async</span> () =&gt; &#123;</span><br><span class="line">                    <span class="keyword">if</span> (isStop) &#123;</span><br><span class="line">                        <span class="keyword">return</span></span><br><span class="line">                    &#125;</span><br><span class="line"></span><br><span class="line">                    <span class="keyword">const</span> item = chunks.shift()</span><br><span class="line">                    <span class="built_in">console</span>.log()</span><br><span class="line">                    <span class="keyword">if</span> (item) &#123;</span><br><span class="line">                        <span class="keyword">const</span> xhr = <span class="keyword">new</span> XMLHttpRequest()</span><br><span class="line">                        <span class="keyword">const</span> index = item.index</span><br><span class="line">                        <span class="comment">// 分片上传失败回调</span></span><br><span class="line"></span><br><span class="line">                        xhr.onerror = <span class="function"><span class="keyword">function</span> <span class="title">error</span>(<span class="params">e</span>) </span>&#123;</span><br><span class="line"></span><br><span class="line">                            isStop = <span class="literal">true</span></span><br><span class="line"></span><br><span class="line">                            reject(e)</span><br><span class="line">                        &#125;</span><br><span class="line">                        <span class="comment">// 分片上传成功回调</span></span><br><span class="line">                        xhr.onload = <span class="function"><span class="keyword">function</span> <span class="title">onload</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line"></span><br><span class="line">                            <span class="keyword">if</span> (xhr.status &lt; <span class="number">200</span> || xhr.status &gt;= <span class="number">300</span>) &#123;</span><br><span class="line">                                <span class="built_in">console</span>.log(<span class="number">1</span>)</span><br><span class="line"></span><br><span class="line">                                isStop = <span class="literal">true</span></span><br><span class="line">                                reject(getError(action, option, xhr))</span><br><span class="line">                            &#125;</span><br><span class="line">                            <span class="keyword">if</span> (counter === len - <span class="number">1</span>) &#123;</span><br><span class="line">                                <span class="built_in">console</span>.log(<span class="number">2</span>)</span><br><span class="line"></span><br><span class="line">                                <span class="comment">// 最后一个上传完成</span></span><br><span class="line">                                resolve()</span><br><span class="line">                            &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">                                <span class="built_in">console</span>.log(<span class="number">3</span>)</span><br><span class="line"></span><br><span class="line">                                counter++</span><br><span class="line">                                <span class="built_in">console</span>(<span class="string">&quot;传了&quot;</span>)</span><br><span class="line">                                start()</span><br><span class="line">                            &#125;</span><br><span class="line">                        &#125;</span><br><span class="line">                        <span class="comment">// 分片上传中回调</span></span><br><span class="line">                        <span class="keyword">if</span> (xhr.upload) &#123;</span><br><span class="line">                            xhr.upload.onprogress = <span class="function"><span class="keyword">function</span> <span class="title">progress</span>(<span class="params">e</span>) </span>&#123;</span><br><span class="line">                                <span class="keyword">if</span> (e.total &gt; <span class="number">0</span>) &#123;</span><br><span class="line">                                    e.percent = e.loaded / e.total * <span class="number">100</span></span><br><span class="line">                                &#125;</span><br><span class="line">                                percentage[index] = e.loaded</span><br><span class="line">                                <span class="built_in">console</span>.log(index)</span><br><span class="line">                                updataPercentage(e)</span><br><span class="line">                            &#125;</span><br><span class="line">                        &#125;</span><br><span class="line">                        xhr.open(<span class="string">&#x27;post&#x27;</span>, action, <span class="literal">true</span>)</span><br><span class="line">                        <span class="keyword">if</span> (option.withCredentials &amp;&amp; <span class="string">&#x27;withCredentials&#x27;</span> <span class="keyword">in</span> xhr) &#123;</span><br><span class="line">                            xhr.withCredentials = <span class="literal">true</span></span><br><span class="line">                        &#125;</span><br><span class="line">                        <span class="keyword">const</span> headers = option.headers || &#123;&#125;</span><br><span class="line">                        <span class="keyword">for</span> (<span class="keyword">const</span> item <span class="keyword">in</span> headers) &#123;</span><br><span class="line">                            <span class="keyword">if</span> (headers.hasOwnProperty(item) &amp;&amp; headers[item] !== <span class="literal">null</span>) &#123;</span><br><span class="line">                                xhr.setRequestHeader(item, headers[item])</span><br><span class="line">                            &#125;</span><br><span class="line">                        &#125;</span><br><span class="line">                        <span class="comment">// 文件开始上传</span></span><br><span class="line">                        xhr.send(item.formData);</span><br><span class="line">                    &#125;</span><br><span class="line">                &#125;</span><br><span class="line"></span><br><span class="line">                <span class="keyword">while</span> (limit &gt; <span class="number">0</span>) &#123;</span><br><span class="line">                    <span class="built_in">setTimeout</span>(<span class="function">() =&gt;</span> &#123;</span><br><span class="line">                        start()</span><br><span class="line">                    &#125;, <span class="built_in">Math</span>.random() * <span class="number">1000</span>)</span><br><span class="line">                    limit -= <span class="number">1</span></span><br><span class="line">                &#125;</span><br><span class="line">            &#125;)</span><br><span class="line">        &#125;</span><br><span class="line"></span><br><span class="line">        <span class="keyword">try</span> &#123;</span><br><span class="line">            <span class="comment">// 调用上传队列方法 等待所有文件上传完成</span></span><br><span class="line">            <span class="keyword">await</span> sendRequest(fileChunkedList, <span class="number">2</span>)</span><br><span class="line">            <span class="comment">// 这里的参数根据自己实际情况写</span></span><br><span class="line">            <span class="keyword">const</span> data = &#123;</span><br><span class="line">                identifier: md5,</span><br><span class="line">                filename: option.file.name,</span><br><span class="line">                totalSize: optionFile.size</span><br><span class="line">            &#125;</span><br><span class="line">            <span class="comment">// 给后端发送文件合并请求</span></span><br><span class="line">            <span class="keyword">const</span> fileInfo = <span class="keyword">await</span> axios(&#123;</span><br><span class="line">                method: <span class="string">&#x27;post&#x27;</span>,</span><br><span class="line">                url: <span class="string">&#x27;http://localhost:8000/myapp/uploadfile/&#x27;</span>,</span><br><span class="line">                data: data</span><br><span class="line">            &#125;, &#123;</span><br><span class="line">                headers: &#123;</span><br><span class="line">                    <span class="string">&quot;Content-Type&quot;</span>: <span class="string">&quot;multipart/form-data&quot;</span></span><br><span class="line">                &#125;</span><br><span class="line">            &#125;).catch(<span class="function"><span class="params">error</span> =&gt;</span> &#123;</span><br><span class="line">                <span class="built_in">console</span>.log(<span class="string">&quot;ERRRR:: &quot;</span>, error.response.data);</span><br><span class="line"></span><br><span class="line">            &#125;);</span><br><span class="line"></span><br><span class="line">            <span class="built_in">console</span>.log(fileInfo);</span><br><span class="line"></span><br><span class="line">            <span class="keyword">if</span> (fileInfo.data.code === <span class="number">200</span>) &#123;</span><br><span class="line">                <span class="keyword">const</span> success = getBody(fileInfo.request)</span><br><span class="line">                option.onSuccess(success)</span><br><span class="line">                <span class="keyword">return</span></span><br><span class="line">            &#125;</span><br><span class="line">        &#125; <span class="keyword">catch</span> (error) &#123;</span><br><span class="line">            <span class="built_in">console</span>.log(error)</span><br><span class="line">            option.onError(error)</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<p>然后建立uploadingFile.vue模板文件</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br></pre></td><td class="code"><pre><span class="line">&lt;template&gt;</span><br><span class="line">  &lt;div&gt;</span><br><span class="line">    &lt;a-upload</span><br><span class="line">      name&#x3D;&quot;file&quot;</span><br><span class="line">      :multiple&#x3D;&quot;true&quot;</span><br><span class="line">      :headers&#x3D;&quot;headers&quot;</span><br><span class="line">      :action&#x3D;&quot;uploadUrl&quot;</span><br><span class="line">      @change&#x3D;&quot;handleChange&quot;</span><br><span class="line">      :remove&#x3D;&quot;beforeRemove&quot;</span><br><span class="line">      :customRequest&#x3D;&quot;chunkUpload&quot;</span><br><span class="line">    &gt;</span><br><span class="line">      &lt;a-button&gt; &lt;a-icon type&#x3D;&quot;upload&quot; &#x2F;&gt; Click to Upload &lt;&#x2F;a-button&gt;</span><br><span class="line">    &lt;&#x2F;a-upload&gt;</span><br><span class="line">  &lt;&#x2F;div&gt;</span><br><span class="line">&lt;&#x2F;template&gt;</span><br><span class="line"></span><br><span class="line">&lt;script&gt;</span><br><span class="line">import chunkUpload from &quot;.&#x2F;axios_http&#x2F;chunkupload&quot;;</span><br><span class="line">export default &#123;</span><br><span class="line">  data() &#123;</span><br><span class="line">    return &#123;</span><br><span class="line">      uploadUrl: &quot;http:&#x2F;&#x2F;192.168.1.65:8000&#x2F;myapp&#x2F;uploadburstfile&#x2F;&quot;,</span><br><span class="line">      chunkUpload: chunkUpload,</span><br><span class="line">      headers: &#123;</span><br><span class="line">          authorization: &#39;authorization-text&#39;,</span><br><span class="line">      &#125;,</span><br><span class="line">    &#125;;</span><br><span class="line">  &#125;,</span><br><span class="line">  methods: &#123;</span><br><span class="line">    beforeRemove(file) &#123;</span><br><span class="line">      &#x2F;&#x2F; 如果正在分片上传，则取消分片上传</span><br><span class="line">      if (file.percentage !&#x3D;&#x3D; 100) &#123;</span><br><span class="line">        this.$store.getters.chunkUploadXhr.forEach((item) &#x3D;&gt; &#123;</span><br><span class="line">          item.abort();</span><br><span class="line">        &#125;);</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;,</span><br><span class="line">    handleChange(info) &#123;</span><br><span class="line">      if (info.file.status !&#x3D;&#x3D; &#39;uploading&#39;) &#123;</span><br><span class="line">        &#x2F;&#x2F; console.log(info.file, info.fileList);</span><br><span class="line">      &#125;</span><br><span class="line">      if (info.file.status &#x3D;&#x3D;&#x3D; &#39;done&#39;) &#123;</span><br><span class="line">        this.$message.success(&#96;$&#123;info.file.name&#125; file uploaded successfully&#96;);</span><br><span class="line">        console.log(info)</span><br><span class="line">        console.log(&#39;成功&#39;)</span><br><span class="line">        if(info.code&#x3D;&#x3D;200)&#123;</span><br><span class="line">          var file_name &#x3D; info.filename</span><br><span class="line">          var task &#x3D; info.task</span><br><span class="line">          mergefile(&#123;</span><br><span class="line">            file:file_name,</span><br><span class="line">            task:task</span><br><span class="line">          &#125;).then((res)&#x3D;&gt;&#123;</span><br><span class="line">            console.log(res.code)</span><br><span class="line">          &#125;)</span><br><span class="line">        &#125;</span><br><span class="line">      &#125; else if (info.file.status &#x3D;&#x3D;&#x3D; &#39;error&#39;) &#123;</span><br><span class="line">        this.$message.error(&#96;$&#123;info.file.name&#125; file upload failed.&#96;);</span><br><span class="line">        console.log(info)</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;,</span><br><span class="line">  &#125;,</span><br><span class="line">&#125;;</span><br><span class="line">&lt;&#x2F;script&gt;</span><br></pre></td></tr></table></figure>



<p>前端搞定了以后来进行后端的编写吧，后端只需要将分片的文件进行临时保存，最后一个文件完成后，第二个接口负责按照分片的临时文件合并写入新文件中，然后将临时文件删除</p>
<p>安装依赖库</p>
<figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">pip3 install python-multipart</span><br></pre></td></tr></table></figure>

<p>编写接口</p>
<figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br></pre></td><td class="code"><pre><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">UploadBurstFile</span>(<span class="params">APIView</span>):</span></span><br><span class="line">    <span class="function"><span class="keyword">def</span> <span class="title">post</span>(<span class="params">self,request</span>):</span></span><br><span class="line">        <span class="built_in">print</span>(<span class="string">&quot;&gt;&gt;&gt;&quot;</span>,request)</span><br><span class="line">        </span><br><span class="line">        file = request.FILES.get(<span class="string">&quot;file&quot;</span>)</span><br><span class="line">        <span class="comment"># 获取唯一标识符</span></span><br><span class="line">        task = request.data.get(<span class="string">&quot;identifier&quot;</span>)</span><br><span class="line">        chunk = request.data.get(<span class="string">&quot;chunkNumber&quot;</span>)</span><br><span class="line">        <span class="built_in">print</span>(task, chunk)</span><br><span class="line">        filename = chunk + task</span><br><span class="line">        contents = file.read()</span><br><span class="line">        <span class="keyword">with</span> <span class="built_in">open</span>(os.path.join(UPLOAD_ROOT,filename), <span class="string">&quot;wb&quot;</span>) <span class="keyword">as</span> f:</span><br><span class="line">            f.write(contents)</span><br><span class="line">        <span class="built_in">print</span>(filename)</span><br><span class="line">        <span class="keyword">return</span> Response(&#123;<span class="string">&quot;filename&quot;</span>: filename, <span class="string">&quot;task&quot;</span>: task&#125;)</span><br><span class="line"></span><br><span class="line">    </span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">UploadFile</span>(<span class="params">APIView</span>):</span></span><br><span class="line">    <span class="function"><span class="keyword">def</span> <span class="title">post</span>(<span class="params">self, request</span>):</span></span><br><span class="line">        target_filename = request.data.get(<span class="string">&quot;filename&quot;</span>)</span><br><span class="line">        task = request.data.get(<span class="string">&quot;identifier&quot;</span>)</span><br><span class="line">        chunk = <span class="number">1</span>    <span class="comment"># 分片序号</span></span><br><span class="line">        <span class="keyword">with</span> <span class="built_in">open</span>(os.path.join(UPLOAD_ROOT,<span class="built_in">str</span>(target_filename)), <span class="string">&quot;wb&quot;</span>) <span class="keyword">as</span> target_f:</span><br><span class="line">            <span class="keyword">while</span> <span class="number">1</span>:</span><br><span class="line">                <span class="keyword">try</span>:</span><br><span class="line">                    filename = os.path.join(UPLOAD_ROOT,<span class="built_in">str</span>(task)+<span class="built_in">str</span>(chunk))</span><br><span class="line">                    <span class="comment">#按照序列打开分片</span></span><br><span class="line">                    source_file = <span class="built_in">open</span>(filename, <span class="string">&quot;ab&quot;</span>)</span><br><span class="line">                    <span class="comment"># 读取分片内容写入新文件</span></span><br><span class="line">                    target_f.write(source_file.read())</span><br><span class="line">                    source_file.close()</span><br><span class="line">                <span class="keyword">except</span> IOError:</span><br><span class="line">                    <span class="keyword">break</span></span><br><span class="line">                chunk += <span class="number">1</span></span><br><span class="line">                os.remove(filename)</span><br><span class="line">        </span><br><span class="line">        <span class="keyword">return</span> Response(&#123;<span class="string">&quot;code&quot;</span>: <span class="number">200</span>&#125;)</span><br></pre></td></tr></table></figure>

<p>这里需要注意的是写入文件时要进行追加，不然最后一个会把前面的文件覆盖掉</p>
<p><img src="vue-js-ant-design%E7%BB%93%E5%90%88Django%E5%AE%9E%E7%8E%B0%E5%A4%A7%E6%96%87%E4%BB%B6%E5%88%86%E7%89%87%E4%B8%8A%E4%BC%A0%5C1.png"></p>

                
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